FTTC Modem: Difference between revisions
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[[Category:Routers]] |
[[Category:Routers]] |
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=No longer supplied= |
=No longer supplied= |
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Note, these Openreach modems are no longer supplied. |
Note, these Openreach modems are no longer supplied. |
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= Related Pages on the A&A Website |
= Related Pages on the A&A Website = |
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*[http://www.aaisp.net.uk/broadband-FC.html www.aaisp.net.uk/broadband-FC.html] |
*[http://www.aaisp.net.uk/broadband-FC.html www.aaisp.net.uk/broadband-FC.html] |
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=RFC 4638 Information= |
=RFC 4638 Information= |
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When using a router with an external modem, one has to use PPPoE on the router as the connection method. This normally means that the MTU on the PPPoE link |
When using a router with an external modem, one has to use PPPoE on the router as the connection method. This normally means that the MTU on the PPPoE link |
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can be no higher than 1492 octets (PPPoE has an 8 octet overhead, and the whole packets has to fit in a 1500 octet Ethernet frame). However there is a |
can be no higher than 1492 octets (PPPoE has an 8 octet overhead, and the whole packets has to fit in a 1500 octet Ethernet frame). However, there is a |
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technique to use ''baby jumbo frames'' to extend the Ethernet frame size to 1508 octets and allow the full 1500 octets on the PPPoE link. |
technique to use ''baby jumbo frames'' to extend the Ethernet frame size to 1508 octets and allow the full 1500 octets on the PPPoE link. |
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